This article covers Western Digital ウエスタンデジタル WD BLACK M.2 SSD 内蔵 8TB NVMe PCIe Gen4 x4 (読取り最大 7200MB.

Overview

Western Digital's WD BLACK SN850X series is a high-end NVMe SSD designed for gaming and creative workloads. The WDS800T2X0E-EC model offers a massive 8TB capacity with sequential read speeds up to 7,200MB/s and write speeds up to 6,600MB/s over a PCIe Gen4 x4 interface. This M.2-2280 drive targets enthusiasts who need both speed and capacity. It's a flagship product in WD's consumer lineup, positioned between mainstream Gen4 drives and the upcoming Gen5 models. For gamers and creators handling large datasets, the SN850X 8TB delivers a compelling balance of performance and endurance.

Compatibility Guide

The SN850X uses the standard M.2-2280 form factor and requires a PCIe Gen4 x4 slot for full speed, though it works in Gen3 slots at reduced speeds (around 3,500MB/s). It's compatible with most modern desktops, laptops (with M.2 slots), and the PlayStation 5, though the latter requires a heatsink attachment. This is a bare drive without a heatsink, so you'll need to use the motherboard's built-in M.2 heatsink or purchase an aftermarket one. The drive is single-sided, making it easier to fit in thin laptops, but double-check the slot thickness before purchase.

Product Info

Released in 2023, the WD_BLACK SN850X 8TB (model WDS800T2X0E-EC) is priced around $1,399.99 USD at launch. It features a WD in-house controller, TLC NAND, and a 5-year warranty with a 4,800TBW endurance rating. The drive is available through major retailers, , and the Western Digital online store. Market positioning: high-end consumer NVMe SSD for gaming and content creation. While more expensive per TB than some competitors, its combination of speed, capacity, and reliability makes it a top choice for those who need large storage without compromise.

Best Use Cases

Gamers: Ideal for AAA game libraries. With 8TB, you can install dozens of modern titles without worrying about space. The fast load times reduce waiting in games like "Cyberpunk 2077" or "Call of Duty: Black Ops 6". If you play only a few games at a time, a 2TB or 4TB drive might be more cost-effective. Content Creators: Video editors working with 4K/8K footage will benefit from the high sequential speeds. The drive can handle large project files and render outputs quickly. For data-intensive tasks like database servers, consider drives with higher random IOPS, but for most creative workflows, this is excellent. PC Enthusiasts: If you want a future-proof storage solution that will last for years, the 8TB SN850X is a solid investment. Even as PCIe 5.0 becomes mainstream, the Gen4 speeds are more than sufficient for real-world use, and the high TBW ensures longevity. ## Alternatives
Direct competitors include the Samsung 990 Pro 8TB (similar performance, slightly higher random IOPS) and the Seagate FireCuda 530 8TB (higher TBW at 5,100TB, but often more expensive). The WD SN850X offers a robust software suite (WD Dashboard) with Game Mode 2.0 for optimizing game performance. In terms of value, the SN850X is often priced competitively, especially in the Japanese market.

Things to Consider

Without a heatsink, thermal throttling can occur during sustained writes. Always use a heatsink. On PCIe 3.0 systems, the drive is limited to ~3,500MB/s, which is still fast but not the full potential. The 8TB capacity is overkill for users who don't store large amounts of data; a 2TB or 4TB variant might be more economical. Also, note that the 3-pack version available on requires three M.2 slots, all Gen4-capable, for optimal use in RAID. ## FAQ Q: Is the SN850X 8TB compatible with the PlayStation 5? A: Yes, it works with the PS5's internal M.2 slot. However, you must install a compatible heatsink to meet Sony's cooling requirements. The drive meets the PS5's NVMe specifications (PCIe Gen4 x4, sequential read >5,500MB/s). Q: How long will this SSD last? A: With a TBW of 4,800TB, the drive can handle 1TB of writes per day for about 13 years. For typical gaming use (20-50GB/day), the lifespan is much longer. The standard warranty is 5 years. Q: Can I use this SSD on a PCIe 3.0 motherboard? A: Yes, it will work but at PCIe 3.0 speeds (~3,500MB/s sequential). This is still fast enough for gaming and most tasks. Upgrade to a Gen4 system later to unlock full performance.

Product Disclosure (Amazon)

  • Manufacturer: WESTERN DIGITAL
  • Brand: ウエスタンデジタル(Western Digital)
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B0H8SHQT5Z
  • Note: This article covers a manufacturer-made product based on Amazon listing details.